基于Excel数据源在AutoCAD快速绘制测量导线控制网

获得导线控制网成果图,需根据观测数据经内业计算、整理出导线点坐标,在AutoCAD中逐线逐点绘制,这一方法通用却低效。文章介绍了一种新的方法,利用Excel快速制作AutoCAD命令清单,以复制、粘贴的方式在AutoCAD中便捷地绘制出测量导线控制网。

某客运专线隧道洞内CPⅡ控制网测量设计与实施

论述了某客运专线隧道洞内CPⅡ控制网测量的任务概述、工程概况、坐标系统、高程系统、隧道洞内CPⅡ导线网测量及二等水准贯通测量的设计与实施,并对后期的施工单位提出了合理的建议。

Comprehensive Study on the Estimation of the Variance Components of Traverse Nets

This paper advances a new simplified formula for estimating variance components ,sums up the basic law to calculate the weights of observed values and a circulation method using the increaments of weights when estimating the variance components of traverse nets,advances the charicteristic roots method to estimate the variance components of traveres nets and presents a practical method to make two real and symmetric matrices two diagonal ones.